flash.c
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ulong mask;
int timeout;
if (info->portwidth == 4)
/* {
printf ("- Warning: erasing of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
return 1;
}*/
{
/* make sure it's Intel flash */
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
/* yup! it's an Intel flash */
/* is it 16-bits wide? */
if (info->chipwidth == 2) {
/* yup! it's 16-bits wide */
/* are there any sectors to process? */
if ((s_first < 0) || (s_first > s_last)) {
printf ("Error: There are no sectors to erase\n");
printf ("Either sector %d is less than zero\n", s_first);
printf ("or sector %d is greater than sector %d\n", s_first, s_last);
return 1;
}
/* check for protected sectors */
prot = 0;
for (sect = s_first; sect <= s_last; ++sect)
if (info->protect[sect])
prot++;
/* if variable "prot" is nonzero, there are protected sectors */
if (prot)
printf ("- Warning: %d protected sectors will not be erased!\n", prot);
/* reset the flash */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* Clear the status register */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_CLR_STAT);
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last; sect++) {
/* is the sector unprotected? */
if (info->protect[sect] == 0) { /* not protected */
/* issue the single block erase command, 0x20 */
flash_cmd (info->portwidth,
(volatile unsigned
char *) info->
start[sect], 0,
CHIP_CMD_ERASE1);
/* issue the erase confirm command, 0xD0 */
flash_cmd (info->portwidth,
(volatile unsigned
char *) info->
start[sect], 0,
CHIP_CMD_ERASE2);
l_sect = sect;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* poll for erasure completion */
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth,
addr, 0,
CHIP_CMD_RD_STAT);
/* setup the status register mask */
mask = CHIP_STAT_RDY |
(CHIP_STAT_RDY << 16);
/* init. the timeout counter */
start = get_timer (0);
/* keep looping while the flash is not ready */
/* exit the loop by timing out or the flash */
/* becomes ready again */
timeout = 0;
while ((*
(volatile unsigned
long *) info->
start[sect] & mask) !=
mask) {
/* has the timeout limit been reached? */
if (get_timer (start)
>
CFG_FLASH_ERASE_TOUT)
{
/* timeout limit reached */
printf ("Time out limit reached erasing sector at address %08lx\n", info->start[sect]);
printf ("Continuing with next sector\n");
timeout = 1;
goto timed_out_error;
}
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->
portwidth,
addr, 0,
CHIP_CMD_RD_STAT);
}
/* did we timeout? */
timed_out_error:if (timeout == 0)
{
/* didn't timeout, so check the status register */
/* create the status mask to check for errors */
mask = CHIP_STAT_ECLBS;
mask = mask | (mask <<
16);
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->
portwidth,
addr, 0,
CHIP_CMD_RD_STAT);
/* are there any errors? */
if ((*
(volatile
unsigned long *)
info->
start[sect] &
mask) != 0) {
/* We got an erasure error */
printf ("Flash erasure error at address 0x%08lx\n", info->start[sect]);
printf ("Continuing with next sector\n");
/* reset the flash */
flash_cmd
(info->
portwidth,
addr,
0,
CHIP_CMD_RST);
}
}
/* erasure completed without errors */
/* reset the flash */
flash_cmd (info->portwidth,
addr, 0,
CHIP_CMD_RST);
} /* end if not protected */
} /* end for loop */
printf ("Flash erasure done\n");
return 0;
} else {
/* The Intel flash is not 16-bit wide */
/* print and error message and return */
/* NOTE: you can add routines here to handle other size flash */
printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
printf ("The erasure code only handles Intel 16-bit wide flash memory\n");
return 1;
}
} else {
/* Not Intel flash so return an error as a write timeout */
/* NOTE: if it's another type flash, stick its routine here */
printf ("Error: The flash device is not Intel type\n");
printf ("The erasure code only supports Intel flash in a 32-bit port width\n");
return 1;
}
}
/* end 32-bit wide flash code */
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
return 1; /* Rom can not be erased */
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { /* RAM just copy 0s to RAM */
for (sect = s_first; sect <= s_last; sect++) {
int sector_size = info->size / info->sector_count;
addr = (char *) (info->start[sect]);
memset ((void *) addr, 0, sector_size);
}
return 0;
}
if ((s_first < 0) || (s_first > s_last)) {
if (info->flash_id == FLASH_UNKNOWN) {
printf ("- missing\n");
} else {
printf ("- no sectors to erase\n");
}
return 1;
}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { /* Intel works spezial */
return flash_erase_intel (info,
(unsigned short) s_first,
(unsigned short) s_last);
}
#if 0
if ((info->flash_id == FLASH_UNKNOWN) || /* Flash is unknown to PPCBoot */
(info->flash_id > FLASH_AMD_COMP)) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
return 1;
}
#endif
prot = 0;
for (sect = s_first; sect <= s_last; ++sect) {
if (info->protect[sect]) {
prot++;
}
}
if (prot) {
printf ("- Warning: %d protected sectors will not be erased!\n", prot);
} else {
printf ("\n");
}
l_sect = -1;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
flash_cmd (info->portwidth, addr, 0x555, 0xAA); /* start erase routine */
flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
flash_cmd (info->portwidth, addr, 0x555, 0x80);
flash_cmd (info->portwidth, addr, 0x555, 0xAA);
flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (char *) (info->start[sect]);
flash_cmd (info->portwidth, addr, 0, 0x30);
l_sect = sect;
}
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
/*
* We wait for the last triggered sector
*/
if (l_sect < 0)
goto DONE;
start = get_timer (0);
last = start;
addr = (volatile unsigned char *) (info->start[l_sect]);
/* broken for 2x16: TODO */
while ((addr[0] & 0x80) != 0x80) {
if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
DONE:
/* reset to read mode */
addr = (volatile unsigned char *) info->start[0];
flash_cmd (info->portwidth, addr, 0, 0xf0);
flash_cmd (info->portwidth, addr, 0, 0xf0);
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
/* broken for 2x16: TODO */
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
/* Commented out since the below code should work for 32-bit(2x 16 flash) */
/* 10-16-2002 P. Marchese */
/* if(info->portwidth==4) return 1; */
/* if(info->portwidth==4) {
printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
return 1;
}*/
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
return 0;
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
memcpy ((void *) addr, src, cnt);
return 0;
}
wp = (addr & ~3); /* get lower word aligned address */
/*
* handle unaligned start bytes
*/
if ((l = addr - wp) != 0) {
data = 0;
for (i = 0, cp = wp; i < l; ++i, ++cp) {
data = (data << 8) | (*(uchar *) cp);
}
for (; i < 4 && cnt > 0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt == 0 && i < 4; ++i, ++cp) {
data = (data << 8) | (*(uchar *) cp);
}
if ((rc = write_word (info, wp, data)) != 0) {
return (rc);
}
wp += 4;
}
/*
* handle word aligned part
*/
while (cnt >= 4) {
data = 0;
for (i = 0; i < 4; ++i) {
data = (data << 8) | *src++;
}
if ((rc = write_word (info, wp, data)) != 0) {
return (rc);
}
wp += 4;
cnt -= 4;
}
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i < 4; ++i, ++cp) {
data = (data << 8) | (*(uchar *) cp);
}
return (write_word (info, wp, data));
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
/* broken for 2x16: TODO */
static int write_word (flash_info_t * info, ulong dest, ulong data)
{
volatile unsigned char *addr = (char *) (info->start[0]);
ulong start;
int flag, i;
ulong mask;
/* modified so that it handles 32-bit(2x16 Intel flash programming */
/* 10-16-2002 P. Marchese */
if (info->portwidth == 4)
/* {
printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
return 1;
}*/
{
/* make sure it's Intel flash */
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
/* yup! it's an Intel flash */
/* is it 16-bits wide? */
if (info->chipwidth == 2) {
/* yup! it's 16-bits wide */
/* so we know how to program it */
/* reset the flash */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* Clear the status register */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_CLR_STAT);
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
/* 1st cycle of word/byte program */
/* write 0x40 to the location to program */
flash_cmd (info->portwidth, (char *) dest, 0,
CHIP_CMD_PROG);
/* 2nd cycle of word/byte program */
/* write the data to the destination address */
*(ulong *) dest = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* setup the status register mask */
mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16);
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RD_STAT);
/* init. the timeout counter */
start = get_timer (0);
/* keep looping while the flash is not ready */
/* exit the loop by timing out or the flash */
/* becomes ready again */
/* 11-13-2002 Paul Marchese */
/* modified while loop conditional statement */
/* because we were always timing out. */
/* there is a type mismatch, "addr[0]" */
/* returns a byte but "mask" is a 32-bit value */
while ((*(volatile unsigned long *) info->
start[0] & mask) != mask)
/* original code */
/* while (addr[0] & mask) != mask) */
{
/* has the timeout limit been reached? */
if (get_timer (start) >
CFG_FLASH_WRITE_TOUT) {
/* timeout limit reached */
printf ("Time out limit reached programming address %08lx with data %08lx\n", dest, data);
/* reset the flash */
flash_cmd (info->portwidth,
addr, 0,
CHIP_CMD_RST);
return (1);
}
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RD_STAT);
}
/* flash is ready, so check the status */
/* create the status mask to check for errors */
mask = CHIP_STAT_DPS | CHIP_STAT_VPPS |
CHIP_STAT_PSLBS;
mask = mask | (mask << 16);
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RD_STAT);
/* are there any errors? */
if ((addr[0] & mask) != 0) {
/* We got a one of the following errors: */
/* Voltage range, Device protect, or programming */
/* return the error as a device timeout */
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RD_STAT);
printf ("Flash programming error at address 0x%08lx\n", dest);
printf ("Flash status register contains 0x%08lx\n", (unsigned long) addr[0]);
/* reset the flash */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
return 1;
}
/* write completed without errors */
/* reset the flash */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
return 0;
} else {
/* it's not 16-bits wide, so return an error as a write timeout */
/* NOTE: you can add routines here to handle other size flash */
printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
printf ("The write code only handles Intel 16-bit wide flash memory\n");
return 1;
}
} else {
/* not Intel flash so return an error as a write timeout */
/* NOTE: if it's another type flash, stick its routine here */
printf ("Error: The flash device is not Intel type\n");
printf ("The code only supports Intel flash in a 32-bit port width\n");
return 1;
}
}
/* end of 32-bit flash code */
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
return 1;
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
*(unsigned long *) dest = data;
return 0;
}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
unsigned short low = data & 0xffff;
unsigned short hi = (data >> 16) & 0xffff;
int ret = write_word_intel ((bank_addr_t) dest, hi);
if (!ret)
ret = write_word_intel ((bank_addr_t) (dest + 2),
low);
return ret;
}
/* Check if Flash is (sufficiently) erased */
if ((*((vu_long *) dest) & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* first, perform an unlock bypass command to speed up flash writes */
addr[0x555] = 0xAA;
addr[0x2AA] = 0x55;
addr[0x555] = 0x20;
/* write each byte out */
for (i = 0; i < 4; i++) {
char *data_ch = (char *) &data;
addr[0] = 0xA0;
*(((char *) dest) + i) = data_ch[i];
udelay (10); /* XXX */
}
/* we're done, now do an unlock bypass reset */
addr[0] = 0x90;
addr[0] = 0x00;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* data polling for D7 */
start = get_timer (0);
while ((*((vu_long *) dest) & 0x00800080) != (data & 0x00800080)) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
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